Bitcoin has many things to do with the current economic situations in different countries,some of these what bitcoin has done to the economic of many countries are -
 first of all it provide employment and source of income thereby regulating the unemployment rate and increasing the efficiency of the economy.
 secondly bitcoin could have hep many countries if they would have acquire some and make it a legal tender years ago.
 thirdly it reduces crime rate in some countries because the reason for some of these crime is unemployment.
 And lastly bitcoin rescues many families and individuals get rid of poverty thereby increasing the quality of life ,helping businesses,and helping the economy in different ways.
Bitcoin has really help the economy , this is just a nutshell of some notable works bitcoin has done to economy of many countries so i don't really see the reason why the government of some countries failed to make it a legal tender till now even after seeing what it has done to their economy.